Sewing-machine bobbin case



L. E. WEAVER. SEWING MACHINE BOBBIN CASE.

APPLICATION HLED FEB. 25. 1921.

Patented May 2, 1922.

FIG-.E.

INVENTUR ATTUENEYE .um'ran stares,

ime? ea -e a;

LUCIUS E. WEAVER, or new HAMPTON, oonnnoriour, Assreuvoa T0 SUMMITTHREAD CGIVIIPANY, or. aas'r HAMPTON, eonivnorrou'r, A CORPORATIONApplication'filed. February 28,1921. Serial No. 448,886.

To all whom it may concern:

Be it known that I, LUCIUS E. WEAVER, a citizen of the United States,residing at East Hampton, in the county of Middlesex and State ofConnecticut, have invented new and useful Improvements in Sewing-MachineBobbin Cases, of which the following is a specification.

This invention relates to a bobbin case having a tubular post, on whichthe tubular core of a universally Wound bobbin is rotatable. The post islongitudinally slotted, and with it is associated bobbin-confining andejecting means adapted to confine the bobbin against removal from thecase, when the shuttle, of which the case forms a member, is operative,and to eject or displace the bobbin, or the core of a spent bobbin, whenthe case is removed from the shuttle body. Said means includes aselements a spring-pressed plunger within the post, provided with abobbin-ejecting finger pro ecting through the post slot, and acam-shaped latch pivoted to the outer end portion of the post, andadapted to confine the bobbin in the case and to hold the plunger andits ejecting finger in an inoperative position, all as shown by thePorter Patent No. 832,414, of October 2, 1906.

The object of the invention is to utilize one of said elements to carrya controlling device for yieldingly retarding the rotation of thebobbin, so that the bobbin will not rotate faster than the call of thethread requires.

The invention is embodied in a bobbin case having the above-describedbobbin-confining and ejecting means, and a resilient bobbin-controllingtongue, attached at one end to the plunger element of said means, at apoint within the post slot andout of the bobbin-containing space in thecase, said tongue having a free end portion normally projecting intosaid space, and adapted to bear on the inner surface of the bobbin coreand yieldingly retard the rotation thereof, the arrangement being suchthat the resilient tongue, when in use, does not require reduction ofthe bulk of the thread winding forming the body of the bobbin, so thatthe employment of the resilient tongue does not involve a reduction ofthe yardage of the thread comprising said Winding.

SEWING-MACHINE herein case.

Specification of Letters Patent. I Patented May 2, 1922.

Of the'accompanying drawings forming a part of this specification,-

Figure 1 is a vertical section of a bobbin case and a bobbin, thebobbin-confining and e ecting means, and the controlling deviceassociated with said means and embodying the invention, being shown inelevation.

Figure 2 is a section on line 22 of bigure 1, the bobbin being removed.

The same reference characters indicate the same parts in all thefigures.

In the drawings, 12 represents a bobbin case of the type shown by theabove-mentioned Porter patent, used in the well known Wheeler and\Vilcox vertical hook sewing machine, although the applicability of thelmprovements herein described is not limited to use in this particulartype of machine. The bobbin case is provided with the usual tubular post13, having at one side a longitudinally extending slot 14. 15 representsthe core and 16 the thread winding of a universally wound bobbin,adapted to rotate on the post 13.

The case is provided, as in the Porter patent, with bobbin-confining andejecting means, one element of said means being a spring-pressed plunger17, having at one end a bobbin-ejecting tongue 18, another element ofsaid means being a latch 19, fitted at 20 to the outer end portion ofthe post 13, and having a cam-shaped member 21 cooperating as describedin the Porter patent, with the plunger 17, in holding the plungerretracted, and the ejecting finger 18 inoperative.

I utilize the said plunger to support a resilient bobbin-controllingtongue, which is attached to the plunger at a point out of thebobbin-containing space of the case, and has a free end portion normallyprojecting into said space, and adapted to bear on a portion of thebobbin and yieldingly retard the rotation thereof, so that the bobbinwill not rotate faster than is required by the call of the thread.

22 represents the resilient tongue, which is attached at 23 as by arivet, to the plunger 17, at a point within the periphery of the tubularpost 13. The free end portion of the resilient tongue 22 normallyprojects through the post slot 14, and into the bobbincontaining space,the arrangement of the tongue being such that it is adapted to bedisplaced inwardly by the core 15 ofa bobbin applied to the post 13, andto bear yieldingly on the internal surface of the bobbin core 15, andthus yieldingly retard the rotation of the bobbin.

1 claim:

In a sewing-machine bobbin case having a tubular post, constituting abearing on which a universally wound bobbin is rotatable, and

provided with a longitudinal slot", and bobbin eonfining and ejectingmeans associated with said post, said means including a plunger Withinthe post, having: a bobbinejecting tongue; a resilientbobbin-controlling tongue attached to said plunger at a point out of thebobbin-containing space, and within the post, and normally projectingthrough the post slot and into the bobbincontaining space, said tonguebeing adapted to be pressed inward from its normal position by the coreof a bobbin applied to the post, and to yieldingly retard the rotationof the bobbin.

lln testimony whereof I have flffiXGCl my signature.

LUCIUS E. WEAVER.

